WASHINGTON (CNN) – Officials say more than half-a-million people around the world have been victims of a computer hacking case, including Miss Teen USA Cassidy Wolf.

Blackshades malware sells for as little as $40 and can be used to hijack computers remotely and turn on computer webcams, access hard drives and capture keystrokes to steal passwords, all without the victim ever knowing it.

According to the FBI, criminals have used Blackshades for everything from extortion to bank fraud and has become one of the world’s most popular remote administration tools.

According to CNN, Cassidy Wolf received an email that included nude photos of herself, which were taken by her computer’s webcam.

The email said, “Either you do one of the things listed below or I upload these pics and a lot more… on all your accounts for everybody to see and your dream of being a model will be transformed into a porn star.”

Documents from the FBI say the hacker demanded sex shows, better-quality photos and videos from Wolf.

Now, officials across the world are cracking down on the hackers.

It is being called one of the largest global cyber-crime crackdowns and has resulted in 90 arrests of suspects linked to Blackshades malware.

Authorities say the most common way criminals have used Blackshades to target victims is through emails containing links.